About: http://webisa.webdatacommons.org/152879501

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In effect, the new lens translates an optical object a distance 2d (twice its thickness) down the axis to form an image.???2 The refractive index of a metamaterial can vary strongly with frequency, especially near resonances.
http://www.w3.org/ns/prov#wasQuotedFrom	laserfocusworld.com